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Conclusion

The updates to Adobe Camera Raw 4.0 are the most significant to date and will
be useful to anyone who is already using ACR, or who is considering a move to
ACR from another converter. ACR has the largest list of supported camera types,
and the new ability to work on JPEG and TIFF images in the converter really
makes this a strong candidate for major image editing work regardless of your
platform or shooting style. All these features are available in Adobe Photoshop
Lightroom 1.0 and in Photoshop CS3.